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Measuring device and measuring method for measuring the power of a high-frequency signal

a high-frequency signal and measurement device technology, applied in the direction of instruments, analogue-digital converters, transmission systems, etc., can solve the problems of extremely complex design of the measuring device and relatively poor signal level at the lower end of the dynamic range, and achieve good measurement accuracy

Active Publication Date: 2010-11-02
ROHDE & SCHWARZ GMBH & CO KG
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This approach enhances measurement accuracy and reduces noise, allowing for precise power measurement across a wide dynamic range without the need for complex synchronization and additional waiting times, improving signal quality and reducing errors.

Problems solved by technology

The disadvantage of the measuring device known from DE 199 55 342 A1 is the use of parallel measurement branches, as a result of which the measuring device suffers from an extremely complex design.
In practice, this causes problems, especially with regard to video bandwidths to be realized within the order of magnitude of 30 MHz.
This leads to a relatively poor signal level at the lower end of the dynamic range.

Method used

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  • Measuring device and measuring method for measuring the power of a high-frequency signal

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Embodiment Construction

[0020]FIG. 1 shows a hitherto usual configuration of a measuring device for measuring the envelope-power and the average-power value. An attenuation element 1, an envelope detector 2, which can be designed as a diode detector, and a pre-amplifier or respectively line driver 3 are arranged in a sensor 16. The sensor 16 is connected via a connecting cable 4 to the basic unit 17. The main amplifier 5, an analog / digital converter 6, a summation stage 7 for subtraction of the zero-point offset, a device 8 for curve correction and a digital signal processor with further evaluation functions, for example, for displaying the envelope curves, for calculation of the average-power value and so on, are disposed in the basic unit 17. The device for curve correction 8 and the digital signal processor 9 together form an evaluation device 8, 9.

[0021]FIG. 2 shows an exemplary embodiment of the measuring device according to the invention in an operating mode A, which is used for measuring the envelop...

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Abstract

A measuring device for measuring the power of a high-frequency signal including a detector for detecting the high-frequency signal and for generating an analog detector signal, an analog / digital converter for generating a digital signal and an evaluation device for evaluating the digital signal. A dither supply device for the supply of a dither signal and a chopper, which periodically chops the analog detector signal with a chopper signal, are disposed between the detector and the analog / digital converter. In this context, the dither signal is supplied synchronously to the chopper signal.

Description

CROSS-REFERENCE TO RELATED APPLICATION[0001]The present application claims priority to PCT Application No. PCT / EP2007 / 003704, filed on Apr. 26, 2007, German Patent Application No. 10 2006 038 030.4, filed on Aug. 14, 2006, German Patent Application No. 10 2006 046 966.6, filed on Oct. 4, 2006, and German Patent Application No. 10 2006 024 698.5, filed on May 26, 2006, the entire contents of which are herein incorporated by reference.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The invention relates to a measuring device for measuring the power, in particular, the envelope power of a high-frequency signal.[0004]2. Discussion of the Background[0005]A measuring device is known from DE 199 55 342 A1. With the measuring device disclosed in this specification, it is possible to measure both the envelope power and also the mean-power or RMS (root mean square) value. To cover the maximum possible dynamic range, the measurement range is divided into several subdivisions, w...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): H03M1/20
CPCG01R19/2506G01R21/01
Inventor BRATFISCH, TORALFBENISCH, CHRISTIAN
Owner ROHDE & SCHWARZ GMBH & CO KG
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